Which of the following statements about elastic collision is correct?
momentum is lost due to the sound produced
loss of momentim is equal to loss in kinetic energy
both kinetic energy and momentum are conserved
kinetic energy is lost while momentum is conserved
Correct answer is C
No explanation has been provided for this answer.
The time rate of change of momentum is
impulse
force
power
pressure
Correct answer is B
No explanation has been provided for this answer.
0.25ms-2
0.50ms-2
2.00ms-2
5.00ms-2
Correct answer is D
amax = \(\omega^2 r = 10^2 \times \frac{5}{100} = 5ms^{-2}\)
The amplitude of the motion of a body performing simple harmonic motion decreases with time because
friction force dissipate the energy of motion
the frequency of oscillation varies with time
the period of oscillation varies with time
energy is supplied by some external agency
Correct answer is B
No explanation has been provided for this answer.
x = Ut + \(\frac{1}{2}t^2\)
x = Ut
x = \(\frac{V^2 - U^2}{2a}\)
x = -\(\frac{1}{2} at^2\)
Correct answer is B
No explanation has been provided for this answer.